The radius of the disk is R, and the mass of the disk is M. Using the parallel axis theorem and theequation for the moment of inertia of a disk about its central axis developed in the previous example, Eq. (8), the moment of inertia of the disk about the specified axis is Fig.
Short Circuits. Short circuits are the second most common reason for breaker tripping and are a more serious concern. Short circuits occur when the black hot wires inside your electrical service panel come in contact with either other hot wires or neutral wires.
Overall, a weakâor lack ofâspark due to a bad wire, or another failed ignition component, has a negative effect on engine performance and mechanical components. Spark plug wires deliver thousands of volts (up to 50,000 or more) to the spark plugs. To carry such large voltages, plug wires need to have some basic physical characteristics. For example, thick insulation to prevent high voltage from jumping off the wire before it reaches the spark plug, and a rubber boot at each end to protect metal connectors from moisture, corrosion, oil, and other contaminants.